modules.d/95iscsi/module-setup.sh

   1 #!/bin/bash
   2
   3 # called by dracut
   4 check() {
   5     local _rootdev
   6     # If our prerequisites are not met, fail anyways.
   7     require_binaries iscsi-iname iscsiadm iscsid || return 1
   8
   9     # If hostonly was requested, fail the check if we are not actually
  10     # booting from root.
  11
  12     is_iscsi() {
  13         local _dev=$1
  14
  15         [[ -L "/sys/dev/block/$_dev" ]] || return
  16         cd "$(readlink -f "/sys/dev/block/$_dev")"
  17         until [[ -d sys || -d iscsi_session ]]; do
  18             cd ..
  19         done
  20         [[ -d iscsi_session ]]
  21     }
  22
  23     [[ $hostonly ]] || [[ $mount_needs ]] && {
  24         pushd . >/dev/null
  25         for_each_host_dev_and_slaves is_iscsi || return 255
  26         popd >/dev/null
  27     }
  28     return 0
  29 }
  30
  31 get_ibft_mod() {
  32     local ibft_mac=$1
  33     local iface_mac iface_mod
  34     # Return the iSCSI offload module for a given MAC address
  35     for iface_desc in $(iscsiadm -m iface | cut -f 2 -d ' '); do
  36         iface_mod=${iface_desc%%,*}
  37         iface_mac=${iface_desc#*,}
  38         iface_mac=${iface_mac%%,*}
  39         if [ "$ibft_mac" = "$iface_mac" ] ; then
  40             echo $iface_mod
  41             return 0
  42         fi
  43     done
  44 }
  45
  46 install_ibft() {
  47     # When iBFT / iscsi_boot is detected:
  48     # - Use 'ip=ibft' to set up iBFT network interface
  49     #   Note: bnx2i is using a different MAC address of iSCSI offloading
  50     #         so the 'ip=ibft' parameter must not be set
  51     # - specify firmware booting cmdline parameter
  52
  53     for d in /sys/firmware/* ; do
  54         if [ -d ${d}/ethernet0 ] ; then
  55             read ibft_mac < ${d}/ethernet0/mac
  56             ibft_mod=$(get_ibft_mod $ibft_mac)
  57         fi
  58         if [ -z "$ibft_mod" ] && [ -d ${d}/ethernet1 ] ; then
  59             read ibft_mac < ${d}/ethernet1/mac
  60             ibft_mod=$(get_ibft_mod $ibft_mac)
  61         fi
  62         if [ -d ${d}/initiator ] ; then
  63             if [ ${d##*/} = "ibft" ] && [ "$ibft_mod" != "bnx2i" ] ; then
  64                 echo -n "rd.iscsi.ibft=1 "
  65             fi
  66             echo -n "rd.iscsi.firmware=1"
  67         fi
  68     done
  69 }
  70
  71 install_iscsiroot() {
  72     local devpath=$1
  73     local scsi_path iscsi_lun session c d conn host flash
  74     local iscsi_session iscsi_address iscsi_port iscsi_targetname iscsi_tpgt
  75
  76     scsi_path=${devpath%%/block*}
  77     [ "$scsi_path" = "$devpath" ] && return 1
  78     iscsi_lun=${scsi_path##*:}
  79     [ "$iscsi_lun" = "$scsi_path" ] && return 1
  80     session=${devpath%%/target*}
  81     [ "$session" = "$devpath" ] && return 1
  82     iscsi_session=${session##*/}
  83     [ "$iscsi_session" = "$session" ] && return 1
  84     host=${session%%/session*}
  85     [ "$host" = "$session" ] && return 1
  86     iscsi_host=${host##*/}
  87
  88     for flash in ${host}/flashnode_sess-* ; do
  89         is_boot=$(cat $flash/is_boot_target)
  90         if [ $is_boot -eq 1 ] ; then
  91             # qla4xxx flashnode session; skip iBFT discovery
  92             iscsi_initiator=$(cat /sys/class/iscsi_host/${iscsi_host}/initiatorname)
  93             echo "rd.iscsi.initiator=${iscsi_initiator}"
  94             return;
  95         fi
  96     done
  97
  98     for d in ${session}/* ; do
  99         case $d in
 100             *connection*)
 101                 c=${d##*/}
 102                 conn=${d}/iscsi_connection/${c}
 103                 if [ -d ${conn} ] ; then
 104                     iscsi_address=$(cat ${conn}/persistent_address)
 105                     iscsi_port=$(cat ${conn}/persistent_port)
 106                 fi
 107                 ;;
 108             *session)
 109                 if [ -d ${d}/${iscsi_session} ] ; then
 110                     iscsi_initiator=$(cat ${d}/${iscsi_session}/initiatorname)
 111                     iscsi_targetname=$(cat ${d}/${iscsi_session}/targetname)
 112                 fi
 113                 ;;
 114         esac
 115     done
 116
 117     [ -z "$iscsi_address" ] && return
 118     local_address=$(ip -o route get to $iscsi_address | sed -n 's/.*src \([0-9a-f.:]*\).*/\1/p')
 119     ifname=$(ip -o route get to $iscsi_address | sed -n 's/.*dev \([^ ]*\).*/\1/p')
 120
 121     #follow ifcfg settings for boot protocol
 122     bootproto=$(sed -n "/BOOTPROTO/s/BOOTPROTO='\([[:alpha:]]*6\?\)4\?'/\1/p" /etc/sysconfig/network/ifcfg-$ifname)
 123     if [ $bootproto ]; then
 124         printf 'ip=%s:%s ' ${ifname} ${bootproto}
 125     else
 126         printf 'ip=%s:static ' ${ifname}
 127     fi
 128
 129     if [ -e /sys/class/net/$ifname/address ] ; then
 130         ifmac=$(cat /sys/class/net/$ifname/address)
 131         printf 'ifname=%s:%s ' ${ifname} ${ifmac}
 132     fi
 133
 134     if [ -n "$iscsi_address" -a -n "$iscsi_targetname" ] ; then
 135         if [ -n "$iscsi_port" -a "$iscsi_port" -eq 3260 ] ; then
 136             iscsi_port=
 137         fi
 138         if [ -n "$iscsi_lun" -a "$iscsi_lun" -eq 0 ] ; then
 139             iscsi_lun=
 140         fi
 141         # In IPv6 case rd.iscsi.initatior= must pass address in [] brackets
 142         case "$iscsi_address" in
 143             *:*)
 144                 iscsi_address="[$iscsi_address]"
 145                 ;;
 146         esac
 147         # Must be two separate lines, so that "sort | uniq" commands later
 148         # can sort out rd.iscsi.initiator= duplicates
 149         echo "rd.iscsi.initiator=${iscsi_initiator}"
 150         echo "netroot=iscsi:${iscsi_address}::${iscsi_port}:${iscsi_lun}:${iscsi_targetname}"
 151         echo "rd.neednet=1"
 152     fi
 153     return 0
 154 }
 155
 156
 157 install_softiscsi() {
 158     [ -d /sys/firmware/ibft ] && return 0
 159
 160     is_softiscsi() {
 161         local _dev=$1
 162         local iscsi_dev
 163
 164         [[ -L "/sys/dev/block/$_dev" ]] || return
 165         iscsi_dev=$(cd -P /sys/dev/block/$_dev; echo $PWD)
 166         install_iscsiroot $iscsi_dev
 167     }
 168
 169     for_each_host_dev_and_slaves_all is_softiscsi || return 255
 170     return 0
 171 }
 172
 173 # called by dracut
 174 depends() {
 175     echo network rootfs-block
 176 }
 177
 178 # called by dracut
 179 installkernel() {
 180     local _arch=$(uname -m)
 181     local _funcs='iscsi_register_transport'
 182
 183     instmods bnx2i qla4xxx cxgb3i cxgb4i be2iscsi qedi
 184     hostonly="" instmods iscsi_tcp iscsi_ibft crc32c iscsi_boot_sysfs
 185
 186     if [ "$_arch" = "s390" -o "$_arch" = "s390x" ]; then
 187         _s390drivers="=drivers/s390/scsi"
 188     fi
 189
 190     dracut_instmods -o -s ${_funcs} =drivers/scsi ${_s390drivers:+"$_s390drivers"}
 191 }
 192
 193 # called by dracut
 194 cmdline() {
 195     local _iscsiconf=$(install_ibft)
 196     {
 197         if [ "$_iscsiconf" ] ; then
 198             echo ${_iscsiconf}
 199         else
 200             install_softiscsi
 201         fi
 202     } | sort | uniq
 203 }
 204
 205 # called by dracut
 206 install() {
 207     inst_multiple -o iscsiuio
 208     inst_libdir_file 'libgcc_s.so*'
 209     inst_multiple umount iscsi-iname iscsiadm iscsid
 210
 211     inst_multiple -o \
 212         $systemdsystemunitdir/iscsid.socket \
 213         $systemdsystemunitdir/iscsid.service \
 214         $systemdsystemunitdir/iscsiuio.service \
 215         $systemdsystemunitdir/iscsiuio.socket \
 216         $systemdsystemunitdir/sockets.target.wants/iscsid.socket \
 217         $systemdsystemunitdir/sockets.target.wants/iscsiuio.socket
 218
 219     if [[ $hostonly ]]; then
 220         inst_dir $(/usr/bin/find /etc/iscsi)
 221     else
 222         inst_simple /etc/iscsi/iscsid.conf
 223     fi
 224
 225     # Detect iBFT and perform mandatory steps
 226     if [[ $hostonly_cmdline == "yes" ]] ; then
 227         local _iscsiconf=$(cmdline)
 228         [[ $_iscsiconf ]] && printf "%s\n" "$_iscsiconf" >> "${initdir}/etc/cmdline.d/95iscsi.conf"
 229     fi
 230
 231     inst_hook cmdline 90 "$moddir/parse-iscsiroot.sh"
 232     inst_hook cleanup 90 "$moddir/cleanup-iscsi.sh"
 233     inst "$moddir/iscsiroot.sh" "/sbin/iscsiroot"
 234     if ! dracut_module_included "systemd"; then
 235         inst "$moddir/mount-lun.sh" "/bin/mount-lun.sh"
 236     else
 237         inst_multiple -o \
 238                       $systemdsystemunitdir/iscsi.service \
 239                       $systemdsystemunitdir/iscsid.service \
 240                       $systemdsystemunitdir/iscsid.socket \
 241                       $systemdsystemunitdir/iscsiuio.service \
 242                       $systemdsystemunitdir/iscsiuio.socket \
 243                       iscsiadm iscsid
 244
 245         mkdir -p "${initdir}/$systemdsystemunitdir/sockets.target.wants"
 246         for i in \
 247                 iscsid.socket \
 248                 iscsiuio.socket \
 249             ; do
 250             ln_r "$systemdsystemunitdir/${i}" "$systemdsystemunitdir/sockets.target.wants/${i}"
 251         done
 252
 253         mkdir -p "${initdir}/$systemdsystemunitdir/basic.target.wants"
 254         for i in \
 255                 iscsid.service \
 256                 iscsiuio.service \
 257             ; do
 258             ln_r "$systemdsystemunitdir/${i}" "$systemdsystemunitdir/basic.target.wants/${i}"
 259         done
 260
 261         # Make sure iscsid is started after dracut-cmdline and ready for the initqueue
 262         mkdir -p "${initdir}/$systemdsystemunitdir/iscsid.service.d"
 263         (
 264             echo "[Unit]"
 265             echo "After=dracut-cmdline.service"
 266             echo "Before=dracut-initqueue.service"
 267         ) > "${initdir}/$systemdsystemunitdir/iscsid.service.d/dracut.conf"
 268
 269         # The iscsi deamon does not need to wait for any storage inside initrd
 270         mkdir -p "${initdir}/$systemdsystemunitdir/iscsid.socket.d"
 271         (
 272             echo "[Unit]"
 273             echo "DefaultDependencies=no"
 274             echo "Conflicts=shutdown.target"
 275             echo "Before=shutdown.target sockets.target"
 276         ) > "${initdir}/$systemdsystemunitdir/iscsid.socket.d/dracut.conf"
 277         mkdir -p "${initdir}/$systemdsystemunitdir/iscsuio.socket.d"
 278         (
 279             echo "[Unit]"
 280             echo "DefaultDependencies=no"
 281             echo "Conflicts=shutdown.target"
 282             echo "Before=shutdown.target sockets.target"
 283         ) > "${initdir}/$systemdsystemunitdir/iscsuio.socket.d/dracut.conf"
 284
 285     fi
 286     inst_dir /var/lib/iscsi
 287     dracut_need_initqueue
 288 }